Camera to user view?
To make your active camera match up with the viewport, use Ctrl + Alt + 0 (Numpad 0, the other zero won't work).
Also, you can track the camera to an empty with the Track To constraint. This will force your camera to point to the empty, which you can place in the center of your medium complexity face mesh. 

To set up the Track To constraint:


Select your empty first, then camera.


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Ctrl + Shift + C key, and choose Track To from the menu.


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Then, go to the Properties panel > Object Constraints tab. The Target: should say Empty. Change the To: axis to -Z and the Up: axis to Y.


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Now your camera will always point to the empty, making things easier for you to position.